Not Ready Device not ready, wait and retry, device is either going to get good or fail and it should timeout itself to Hardware Error if so. This sense key may also be returned if the device server is unable to distinguish between a flaw in the medium and a specific hardware failure (i.e., sense key 4h). 0x04 In such a case some random other command will be failed with a sense buffer that indicates the problem was in a previous command. You will need to reformulate the request or plain avoid it altogether. http://wx2me.com/scsi-sense/scsi-sense-data-dump-error-code-0x70.php
The sense type is important to decode the sense buffer, you need to know if it is a fixed format or a descriptor format. Included in the hyper-text are text links that speed the process of locating ASC/ASCQ values of interest. The normal BER for SCSI links is around 10^-15 and so about 1 error per day at full data-rate of about 6Gbps is perfectly acceptable, above that it really depends on Until such resolution occurs, the applicable written SCSI standard or standards apply.
If the device server detects an invalid parameter in the additional parameters supplied as data, the device server may have already altered the medium. 0x06 UNIT ATTENTION Indicates that a unit However all three fields are usually logically combined into a 20 bit field called Key Code Qualifier or KCQ. Hardware Error An hardware error is reported when the disk reaches a fatal state and will not recover from this.
The command that you performed is likely to be just fine but there was some other condition in the device that requires the user’s attention. The disk can no longer be read or written. If the disk is configured to auto-reassign than a write to that area will cause the disk to reassign and the problem will be gone, if the disk is not configured Scsi Asc Ascq Please try the request again.
The attention needs to be taken care of and the command that was unfortunate enough to be failed for this can be retried. Scsi Error Codes The additional sense code (ASC) byte indicates information about the error exception reported in the sense key field. The first bit of the first byte that is lighted says that the information field has meaning and in the case of a medium error (sense key 3h) the meaning is http://blog.disksurvey.org/knowledge-base/scsi-sense/ At some cases a retry to read the data may get the data eventually but it doesn’t have a high likelyhood and it incurs a great penalty in time since normally
The sense key is the key to understand the error code. Sense: 5/24/00 The specification for the target device will define the list of possible KCQ values. A SCSI sense has several top-level attributes that one would care about the most: Sense type, either fixed or descriptor, What command it relates to, current or previous, Sense Key, ASC/ASCQ Retrieved from "http://www.stix.id.au/wiki/index.php?title=SCSI_Sense_Data&oldid=3275" Category: Computing Navigation menu Personal tools Log in Namespaces Page Discussion Variants Views Read View source View history More Search wiki navigation Main PageRecent changesRandom pageHelp www.stix.id.au navigation
Misinformation found herein copyright Paul Ripke (aka "stix") [email protected] http://stix.id.au/wiki/SCSI_Sense_Data Key Code Qualifier From Wikipedia, the free encyclopedia Jump to: navigation, search "KCQ" redirects here. Scsi Sense Data REQUIRED 2 / 04 / 03 LOGICAL UNIT NOT READY, MANUAL INTERVENTION REQUIRED 2 / 04 / 04 LOGICAL UNIT NOT READY, FORMAT IN PROGRESS 2 / 04 / 07 LOGICAL Aborted Command - Data Phase Error This process is part of a SCSI protocol called Contingent Allegiance Condition.
UNKNOWN FORMAT 2 / 30 / 05 CANNOT WRITE MEDIUM . get redirected here Common sense keys are: 1h Recovered Error — informational only 2h Not ready — temporary error, need to wait it out 3h Medium Error — may work if retried, disappears after Medium Error A medium error means that you tried to read or write data and the disk failed. INCOMPLETE TRACK IN SESSION 5 / 72 / 04 EMPTY OR PARTIALLY WRITTEN RESERVED TRACK Notes: 1. Scsi Sense Codes Decoder
All values are in hexadecimal 2. Scsi Sense Data Sense Key 3 Sense Code 11 Sense Qualifier 0 Examples for this can be when MODE SELECT is used to set Mode Parameters, when an initiator is lost and then you get an I_T_L NEXUS LOSS or several other such In a SCSI disk there are two bits AWRE and ARRE that control if a auto-reallocation is done by the disk.
If a sector is having problems and it took a non-trivial amount of work to recover from it a recovered error may be reported with an ASC of 11h, 17h or The read or write operation is not performed. 0x08 BLANK CHECK Indicates that a write-once device or a sequential-access device encountered blank medium or format-defined end-of-data indication while reading or that When multiple recovered errors occur during one command, the choice of which error to report (e.g., first, last, most severe) is vendor specific. 0x02 NOT READY Indicates that the logical unit Scsi Sense Codes Vmware One part that is a bit harder to decode is what is the LBA that actually failed.
A disk tried to read or write and failed. The next part is the ASC and ASCQ these are found in bytes 12 and 13 (13 and 14 if counting from 1). The first byte to look at is byte 0, and what matters there are the 7 lower bits, so if the number is at or above 80h (128 decimal) you need my review here RECOMMEND REASSIGNMENT 1 / 18 / 06 RECOVERED DATA .
Descriptions of the assigned ASC and ASCQ values and their coded meanings are organized in tables that are sorted numerically based on the ASC/ASCQ values or alphabetically based on the text Either the command is invalid or it is unsupported by the disk. A Not Ready sense is returned when the device is powering up and not yet ready to really respond to anything serious, such as when an HDD is still spinning up One important distinction about a sense buffer is wether the sense is about the command that failed with the sense or a previous command.
List of common SCSI KCQs Category Key ASC ASCQ Error Condition No Sense 0 00 00 No error 0 5D 00 No sense - PFA threshold reached Soft Error 1 01 There are two reasons why a recovered error would be returned: SMART Trip Medium Errors recovered If a disk finds that it is about to fail according to its SMART logic